Hey i have a 2004 raptor 660. It has a white bros series e exhaust, k&n air and a jet kit. Just recently i put in a stock diameter piston that raises the compresion to 11:1, i also put a stage one hotcam in it, and i have been running a 50:50 mix of vp110 and 91 pump gas. After i got that all done it would run but it needs jetting bad. My mechanic says the carb isn't big enought. What jets do i need to change and what size if you know, or just tell me what i need to do? There are dead spots in the throttle and it backfires horribly when wide open.